VI
5.5 Check first when you have a trouble..............................................................343
5.5.1 Motor does not start............................................................................................................... 343
5.5.2 Motor or machine is making abnormal acoustic noise........................................................... 345
5.5.3 Inverter generates abnormal noise ........................................................................................ 345
5.5.4 Motor generates heat abnormally .......................................................................................... 345
5.5.5 Motor rotates in the opposite direction................................................................................... 346
5.5.6 Speed greatly differs from the setting .................................................................................... 346
5.5.7 Acceleration/deceleration is not smooth ................................................................................ 346
5.5.8 Speed varies during operation............................................................................................... 347
5.5.9 Operation mode is not changed properly............................................................................... 347
5.5.10 Operation panel (FR-DU07) display is not operating............................................................. 348
5.5.11 Motor current is too large....................................................................................................... 348
5.5.12 Speed does not accelerate .................................................................................................... 349
5.5.13 Unable to write parameter setting.......................................................................................... 349
5.5.14 Power lamp is not lit............................................................................................................... 349
6 PRECAUTIONS FOR MAINTENANCE AND INSPECTION 351
6.1 Inspection item .................................................................................................352
6.1.1 Daily inspection...................................................................................................................... 352
6.1.2 Periodic inspection................................................................................................................. 352
6.1.3 Daily and periodic inspection ................................................................................................. 353
6.1.4 Display of the life of the inverter parts ................................................................................... 354
6.1.5 Checking the inverter and converter modules ....................................................................... 354
6.1.6 Cleaning................................................................................................................................. 354
6.1.7 Replacement of parts............................................................................................................. 355
6.1.8 Inverter replacement.............................................................................................................. 358
6.2 Measurement of main circuit voltages, currents and powers......................359
6.2.1 Measurement of voltages and currents ................................................................................. 359
6.2.2 Measurement of powers ........................................................................................................ 361
6.2.3 Measurement of voltages and use of PT............................................................................... 361
6.2.4 Measurement of currents....................................................................................................... 362
6.2.5 Use of CT and transducer...................................................................................................... 362
6.2.6 Measurement of inverter input power factor .......................................................................... 362
6.2.7 Measurement of converter output voltage (across terminals P/+ and N/-) .......................... 363
6.2.8 Insulation resistance test using megger ................................................................................ 363
6.2.9 Pressure test.......................................................................................................................... 363
7 SPECIFICATIONS 365
7.1 Rating ................................................................................................................366
7.2 Common specifications...................................................................................367
7.3 Outline dimension drawings ...........................................................................369
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